Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

LX200GPS - Not pointing North

  • Please log in to reply
7 replies to this topic

#1 Hector65

Hector65

    Lift Off

  • -----
  • topic starter
  • Posts: 4
  • Joined: 05 Aug 2020

Posted 05 August 2020 - 06:37 AM

Hi

I recently set up my LX200GPS for the first time in 6 years or so. Everything seems to be good apart from when it tries to point north, it seems to be out to the west by around 40 degrees, so around 320 degrees. 
 

I'm based in Melbourne, Australia. I've updated the firmware and added fixes using Starpatch. 
I'm pointing the base south and am pointing the scope north and level for home. Scope is set up AltAz
 

Does anyone have any ideas of what could be the issue or what I am doing wrong. 
 

Any suggestions gratefully received 

 

Dave



#2 OzAndrewJ

OzAndrewJ

    Soyuz

  • *****
  • Posts: 3,807
  • Joined: 30 Nov 2010

Posted 05 August 2020 - 03:53 PM

Gday Dave

Probably a nearby local magnetic anomaly.

Just do a new Cal Sensors to account for it

or better still, just learn to do a manual 2 star.

Saves a lot of time :-)

 

Andrew Johansen Melbourne Australia



#3 Hector65

Hector65

    Lift Off

  • -----
  • topic starter
  • Posts: 4
  • Joined: 05 Aug 2020

Posted 05 August 2020 - 07:23 PM

Thanks Andrew

 

Nice to see another Melbournite on here grin.gif  I'm in sunny Mornington. 

 

I did do another Sensor Calibration last night but it pointed at exactly the same spot, around 320 degrees.  I'm pretty happy to do the manual 2 star, I'll have a go if we get a break in the cloud, over the next week. I was just hoping I was missing something obvious frown.gif

 

Many Thanks 

 

Dave



#4 nitegeezer

nitegeezer

    Galactic Ghost

  • *****
  • Posts: 7,094
  • Joined: 27 Nov 2007

Posted 05 August 2020 - 07:37 PM

When I do outreach events, I have a similar problem. I don't know if the issue is with the outreach site or at home where I did the cal. I do know that underground power will throw me off, not sure what else can.
  • Hector65 likes this

#5 OzAndrewJ

OzAndrewJ

    Soyuz

  • *****
  • Posts: 3,807
  • Joined: 30 Nov 2010

Posted 05 August 2020 - 07:43 PM

Gday Dave

I'm in sunny Mornington.

Im near the Toorak Rd / Sth Eastern interchange

so am probably in the middle of the Melb light dome :-)

but can still easily 2 star align.

If you are Alt Az and can see South, there are a lot of good bright align stars to use.

 

I'll have a go if we get a break in the cloud

lol.giflol.giflol.giflol.giflol.gif

Have you looked at the latest forecasts ????

 

Andrew Johansen Melbourne Australia


  • Hector65 likes this

#6 Hector65

Hector65

    Lift Off

  • -----
  • topic starter
  • Posts: 4
  • Joined: 05 Aug 2020

Posted 05 August 2020 - 09:14 PM

Andrew

 

 

 

If you are Alt Az and can see South, there are a lot of good bright align stars to use.

 

 

I can definitely see some nice stars to align to. 

 

Yes, I've seen the forecast frown.gif  Not looking good. Hopefully Sunday or Monday might be clear nights. Still managed to get an hour in last night, just looking at Jupiter and Saturn..... in between the clouds.

 

I've been away for a long time, so am just getting back into it. I'm hoping to do a bit of Astrophotography, especially during this 6 week lockdown.

 

Dave



#7 Hector65

Hector65

    Lift Off

  • -----
  • topic starter
  • Posts: 4
  • Joined: 05 Aug 2020

Posted 09 August 2020 - 09:54 PM

Gday Dave

Im near the Toorak Rd / Sth Eastern interchange

so am probably in the middle of the Melb light dome :-)

but can still easily 2 star align.

If you are Alt Az and can see South, there are a lot of good bright align stars to use.

 

lol.giflol.giflol.giflol.giflol.gif

Have you looked at the latest forecasts ????

 

Andrew Johansen Melbourne Australia

Hi Andrew

Even though North was still off last night, the 2 star alignment was quick and easy.  It then accurately slewed to objects, everytime grin.gif  

 

Dave 



#8 OzAndrewJ

OzAndrewJ

    Soyuz

  • *****
  • Posts: 3,807
  • Joined: 30 Nov 2010

Posted 09 August 2020 - 11:15 PM

Gday Dave

 

Good to hear.

Auto aligning is just a gimmick, as once the mount centres the first star

all the align methods are the same,

ie all the dancing etc does is "try" to get the first star close.

If you know north and a few stars, manual 2 star is the way to go.

Andrew Johansen Melbourne Australia


Edited by OzAndrewJ, 09 August 2020 - 11:16 PM.

  • Piet Le Roux likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics